if we reduce the length of heating element by 10% then the power dissipated by it will
a) increase by 9%
b) increase by 4%
c) increase by 19%
d) increase by 11%
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Answered by
2
Answer:
increased by 9%
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Answered by
10
Answer:
Explanation:
Let say Resistance of Heating element = R
Power Dissipated = V²/R
R = ρL/A
Length is Decreased by 10 %
L' = L - (10/100)L = 0.9L
R' = ρL'/A
=> R' = 0.9R
Power Dissipated = V²/0.9R
= (V²/R)/0.9
= (V²/R)*(10/9)
Power increased by 10/9 - 1 = 1/9
in % = 100/9 = 11.11 %
the power dissipated by it will increase by 11.11 %.
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